Patient Preparation Assay not recommended when patient is receiving prednisone/prednisolone therapy due to cross reactivity with the antibody used in this assay
Preferred Specimen(s) 1 mL serum
Instructions Collect specimen between 3-5 P.M. Indicate collection time on specimen container and test requisition.
Transport Container Plastic screw-cap vial
Transport Temperature
- Ambient 5 days,
- Refrigerated 7 days
Methodology Chemiluminescence
Clinical Significance Cortisol is increased in Cushing’s disease and decreased in Addison’s disease (adrenal insufficiency)